中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 岩石圈演化国家重点实验室
P-wave velocity structure in upper crust and crystalline basement of the Qinhang and Wuyishan Metallogenic belts : constraint from the Wanzai-Hui'an deep seismic sounding profile

文献类型：期刊论文

作者Lin JiYan2,3,5; Tang GuoBin3; Xu Tao3,6; Cai HuiTeng4; Lu QingTian1; Bai ZhiMing3; Deng YangFan7; Huang MinFu2,3; Jin Xing4
刊名CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
出版日期2020-12-01
卷号63期号:12页码:4396-4409
ISSN号0001-5733
关键词Qinhang Metallogenic Belt (QMB) Wuyishan Metallogenic Belt(WMB) Finite difference traveltime inversion Crystalline basement Upper crustal velocity structure
DOI10.6038/cjg2020O0158
英文摘要The Qinhang Metallogenic Belt (QMB) and Wuyishan Metallogenic Belt (WMB) are two major ones in South China, in which mineralization occurred mainly in an intracontinental orogeny during the Mesozoic. Geologic research shows that the characteristics of crystalline basement and faults have significant controls on the metallogenic processes, so probing the upper crustal structure has reference value to the study on the distinction of the metallogenesis. This work builds on the first arrival data from the NW-SE Deep Seismic Sounding (DSS) profile, which transects the QMB and the WMB, extending from Waizai, Jiangxi Province to Hui' an, Fujian Province. The upper crustal P wave velocity structure at depths 0 similar to 8 km is imaged by using the finite difference travel time tomography method. The results show that (1) the P wave velocity of the QMB and WMB is heterogeneous in lateral direction and the crystalline basement is relatively shallow, about 1. 0 similar to 3. 0 km, using the 5. 8 km . s(-1) contour line as reference. The crystalline basement's depth of the QMB is relatively smaller than the WMB, with 0. 5 similar to 2. 0 km and 1. 5-3. 0 km, respectively. (2) The high velocity zones (positive velocity anomaly) have a good accordance with the magmatic rocks on the surface, while the low velocity zones (negative velocity anomaly) have a good accordance with the major faults or the sedimentary basins. The low velocity beneath the Shaoxing-Jiangshan-Pingxiang Fault (SJPF) and Zhenghe-Dapu Fault (ZDF) indicates that both extend downward more than 8 km, which separate the Yangtze block and Cathaysia block. (3) Based on the existing geological and geophysical data, we speculate that the discrepancy of the upper crustal P wave velocity, the depth of crystalline basement and the faults' properties beneath the QMB and WMB are the key factors to result in the discrepancy of the two metallogenic belts.
WOS关键词SOUTH CHINA ; STRUCTURE BENEATH ; SOUTHEASTERN CHINA ; MARGIN ; REFLECTION ; TECTONICS
WOS研究方向Geochemistry & Geophysics
语种英语
出版者SCIENCE PRESS
WOS记录号WOS:000595589000010
源URL[http://ir.iggcas.ac.cn/handle/132A11/99891]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Xu Tao
作者单位1.Chinese Acad Geol Sci, Beijing 100037, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Liihospher Evolut, Beijing 100029, Peoples R China
4.Earthquake Adm Fujian Prov, Fuzhou 350003, Peoples R China
5.China Earthquake Adm, Geophys Explorat Ctr, Zhengzhou 450002, Peoples R China
6.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
7.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China
推荐引用方式
GB/T 7714		 Lin JiYan,Tang GuoBin,Xu Tao,et al. P-wave velocity structure in upper crust and crystalline basement of the Qinhang and Wuyishan Metallogenic belts : constraint from the Wanzai-Hui'an deep seismic sounding profile[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2020,63(12):4396-4409.
APA Lin JiYan.,Tang GuoBin.,Xu Tao.,Cai HuiTeng.,Lu QingTian.,...&Jin Xing.(2020).P-wave velocity structure in upper crust and crystalline basement of the Qinhang and Wuyishan Metallogenic belts : constraint from the Wanzai-Hui'an deep seismic sounding profile.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,63(12),4396-4409.
MLA Lin JiYan,et al."P-wave velocity structure in upper crust and crystalline basement of the Qinhang and Wuyishan Metallogenic belts : constraint from the Wanzai-Hui'an deep seismic sounding profile".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 63.12(2020):4396-4409.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。